<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="isAll" />
      {{isAll?'取消全选':'全选'}}
    </label>
    <span> <span>已完成{{trueCount}} </span> / 全部{{allCount}} </span>
    <button 
      class="btn btn-danger"
      @click="clearFn"
    >清除已完成任务</button>
  </div>
</template>

<script>
export default {
  name: "Footer",
  props:['allCount','trueCount','todoList'],
  methods:{
    clearFn(){
      this.$emit('clearFn')
    },
  },

  computed:{
     // 小选框和全选框
    isAll:{
      set(checked){
        this.todoList.forEach(p=>p.done = checked)
      },
      get(){
        return this.todoList.every(p => p.done === true)
      }
    }
  }
};
</script>

<style>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
